Eleven Multi-planet Systems from K2 Campaigns 1 & 2 and the Masses of Two Hot Super-Earths

Understand

We present a catalog of 11 multi-planet systems from Campaigns 1 and 2 of the K2 mission.

• We report the sizes and orbits of 26 planets split between seven 2-planet systems and four 3-planet systems.
• These planets stem from a systematic search of the K2 photometry for all dwarf stars observed by K2 in these fields.
• We precisely characterized the host stars with adaptive optics imaging and analysis of high-resolution optical spectra from Keck/HIRES and medium-resolution spectra from IRTF/SpeX.